Hi Shane,
In addition to Bob's answer, you may be interested in a web page I put together 13 years ago in 2006. It's pretty long but you may find the data on the page interesting.
Our AskACatholic.com 2006 Catholic Demographics page
I think my source for this was a 2006 Catholic Almanac. If you are interested, you can get a 2016 Catholic Almanac - (Pages 430 to 439) to see how the numbers have changed since then or just browse through one in a local bookstore.
I sense they are published about once every 2-3 years.
Mike
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